Pterygomandibular raphe

Pterygomandibular raphe is a ligamentous band of the buccopharyngeal fascia, a deep fascia of the neck. It is a significant anatomical structure in the oral cavity, particularly in the field of dentistry and oral surgery.

Etymology

The term "pterygomandibular" is derived from the Greek words "pteryx" meaning wing, and "mandibula" meaning jaw. "Raphe" is also a Greek word, meaning seam or suture.

Anatomy

The pterygomandibular raphe extends from the pterygoid hamulus and the tensor veli palatini to the posterior end of the mylohyoid line of the mandible, behind the third molar tooth. It serves as a dividing line between the buccal (cheek) and oral (mouth) parts of the oral cavity.

Clinical significance

The pterygomandibular raphe is a crucial landmark in dentistry and oral surgery. It is the site of injection for an inferior alveolar nerve block, a common local anesthetic procedure in dentistry.

Related terms

• Pterygoid hamulus: A small hook-like structure on the lower end of the medial pterygoid plate of the sphenoid bone.
• Tensor veli palatini: A broad, thin, ribbon-like muscle in the head that tenses the soft palate.
• Mylohyoid line: A ridge on the inner surface of the mandible.
• Buccal: Pertaining to the cheek.
• Oral: Pertaining to the mouth.

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  Anatomical illustration showing the pterygomandibular raphe.

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  Open mouth view showing the pterygomandibular ligaments.